Vulnerability · Published Oct 28, 2026 · Assigned by VulnCheck
CVE-2026-118376WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses
Medium 5.3
In plain English
A medium-severity server-side request forgery in WeKnora from Tencent. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 80.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP() that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via web_fetch or URL-based knowledge import to reach internal services or cloud metadata endpoints.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/Tencent/WeKnora/issues/4092 issue-tracking
- https://github.com/Tencent/WeKnora/commit/ff818b681f10bc29edbc48fe35f00009dc276bfa patch
- https://github.com/Tencent/WeKnora/commit/d7ccd5ba517cc3968e6d5000a2ab0f4b51ef1dda patch
- https://github.com/Tencent/WeKnora/blob/3d5d8bfcdfeeea266b292b71cea616847af28d0f/internal/utils/security.go#L267-L327 technical-description
- WeKnora v0.8.2 Release Notes release-notes
- https://github.com/Tencent/WeKnora product
- VulnCheck Advisory: WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses third-party-advisory